一、材料选择:1、平台板面积A(CM2)单位重量(KG/M)截面特性W(CM3)花纹钢板4.0040.0031.402.672、踏步单位重量(KG/M)截面特性W(CM3)Z280X60X4.517.4318.453.763、楼梯梁单位重量(KG/M)截面特性W(CM3)槽钢20a28.8022.60178.0022a31.8025.00218.00钢板25.0019.63104.17250.0010.004、板下分隔构件单位重量(KG/M)截面特性W(CM3)L50X5.04.803.777.89槽钢12.7010.0039.7010a二、几何条件:L1L2L3输入:1.504.800.00三、荷载统计:板下分隔构件平台板(L1/m*C12+C28*E28+C30*E30)/100C121、恒载0.611.912、活载装修荷载1.053.503.501.60栏杆线荷载3、荷载0.202.207.20钢楼梯计算程序:(简图如右)四、验算2.00正应力正应力63.6530.36剪应力剪应力3.100.27挠度(Vt)挠度(Vt)1.820.545.402.00挠度验算:1.001.001满足要求挠度(Vq)0不满足要求1.154.50挠度验算:1.001满足要求0不满足要求构件选择几何条件与高度有关项选择标志验算结果注意事项L/300平台板L/150,余L/2501.000.000.001.000.00HLnmnZS2.501.355.0016.006.00踏步数量分隔构件数量踏步板楼梯梁C16((C12*Ln*(L1+L3)/2/(L1+L2+L3)+(ZS*E28*C28+ZS*E30*C31)*Ln/2+(n+1)*C16*Ln/2)/(L1+L2+L3)+C20*E20+C22*E22)/1000.601.900.912.361.995.58正应力正应力8.8s16.0020.0022.00120.72155.6424.0037.5045.00剪应力剪应力端剪力10.9s30.0046.5057.000.776.1120.38挠度(Vt)挠度(Vt)2.8924.545.4025.201.001.00挠度(Vq)挠度(Vq)1.7413.613.8621.001.001.00中间结果规范要求L/300螺栓承载力参考平台板L/150,余L/250